:root {
  --bg-body: #0b0f19;
  --bg-card: #111827;
  --border-subtle: #1e293b;
  --primary-blue: #2563eb;
  --primary-hover: #1d4ed8;
  --accent-cyan: #06b6d4;
  --status-online: #10b981;
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body { background-color: var(--bg-body); color: var(--text-primary); font-family: var(--font-sans); line-height: 1.7; }
.container { max-width: 860px; margin: 0 auto; padding: 0 1.5rem; }
header { padding: 1.25rem 0; border-bottom: 1px solid var(--border-subtle); }

.nav-content { display: flex; justify-content: space-between; align-items: center; }
.brand { display: flex; align-items: center; gap: 0.75rem; text-decoration: none; color: inherit; }
.brand-icon { background-color: var(--bg-card); border: 1px solid var(--border-subtle); border-radius: 8px; padding: 0.4rem; display: flex; align-items: center; justify-content: center; box-shadow: 0 4px 12px rgba(37, 99, 235, 0.25); }
.brand-title { font-weight: 700; font-size: 1.25rem; letter-spacing: -0.02em; }
.brand-subtitle { font-size: 0.7rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.08em; }
.nav-actions { display: flex; align-items: center; gap: 1rem; }
.lang-switch { color: var(--text-secondary); text-decoration: none; font-size: 0.82rem; font-weight: 600; padding: 0.25rem 0.55rem; border-radius: 6px; border: 1px solid var(--border-subtle); transition: all 0.2s; }
.lang-switch:hover { color: var(--text-primary); border-color: var(--primary-blue); background-color: rgba(37, 99, 235, 0.08); }
.post-header { padding: 3rem 0 2rem; border-bottom: 1px solid var(--border-subtle); margin-bottom: 2.5rem; }
.badge { display: inline-block; background: rgba(37,99,235,0.12); color: #93c5fd; padding: 0.25rem 0.6rem; border-radius: 9999px; font-size: 0.8rem; font-weight: 600; margin-bottom: 1rem; border: 1px solid rgba(37,99,235,0.3); }
h1 { font-size: clamp(2rem, 4vw, 2.7rem); line-height: 1.2; margin-bottom: 1rem; letter-spacing: -0.02em; }
.meta-lead { font-size: 1.15rem; color: var(--text-secondary); }

/* Tutorial Content */
h2 { font-size: 1.6rem; margin: 2.5rem 0 1rem; color: var(--text-primary); }
h3 { font-size: 1.25rem; margin: 1.75rem 0 0.75rem; color: #93c5fd; }
p, ul, ol { margin-bottom: 1.25rem; color: var(--text-secondary); }
ul, ol { padding-left: 1.5rem; }
li { margin-bottom: 0.5rem; }
strong { color: var(--text-primary); }
code { font-family: var(--font-mono); background: #1e293b; color: #38bdf8; padding: 0.15rem 0.4rem; border-radius: 4px; font-size: 0.9em; }

/* Step Box */
.step-card { background: var(--bg-card); border: 1px solid var(--border-subtle); border-radius: 10px; padding: 1.5rem; margin-bottom: 1.5rem; }
.step-number { font-family: var(--font-mono); font-size: 0.8rem; background: var(--primary-blue); color: #fff; padding: 0.2rem 0.6rem; border-radius: 6px; font-weight: 700; margin-bottom: 0.5rem; display: inline-block; }

/* Screenshot Placeholder */
.screenshot-box { border: 2px dashed #334155; background: #0f172a; border-radius: 8px; padding: 2.5rem 1rem; text-align: center; color: var(--text-muted); font-size: 0.9rem; margin: 1.25rem 0; }
.screenshot-box span { display: block; font-size: 1.5rem; margin-bottom: 0.4rem; }

/* Comparison Table */
table { width: 100%; border-collapse: collapse; margin: 1.5rem 0; font-size: 0.95rem; }
th, td { padding: 0.75rem 1rem; text-align: left; border-bottom: 1px solid var(--border-subtle); }
th { background: #151f32; color: var(--text-primary); }
td { color: var(--text-secondary); }

/* Callout */
.callout { background: rgba(6,182,212,0.08); border-left: 4px solid var(--accent-cyan); padding: 1rem 1.25rem; border-radius: 0 8px 8px 0; margin: 1.5rem 0; }

/* Waitlist Form */
.waitlist-card { background: var(--bg-card); border: 1px solid var(--border-subtle); border-radius: 12px; padding: 2rem; margin: 4rem 0 3rem; text-align: center; }
.waitlist-card h3 { font-size: 1.35rem; color: var(--text-primary); margin-bottom: 0.5rem; }
.form-group { display: flex; gap: 0.5rem; max-width: 480px; margin: 1.25rem auto 0; flex-direction: column; }
@media (min-width: 500px) { .form-group { flex-direction: row; } }
.input-email { flex: 1; background: #0b0f19; border: 1px solid var(--border-subtle); border-radius: 8px; padding: 0.75rem 1rem; color: var(--text-primary); outline: none; }
.input-email:focus { border-color: #3b82f6; }
.btn-submit { background: var(--primary-blue); color: #fff; border: none; border-radius: 8px; padding: 0.75rem 1.4rem; font-weight: 600; cursor: pointer; }
.btn-submit:hover { background: var(--primary-hover); }
.form-feedback { margin-top: 0.8rem; font-size: 0.85rem; display: none; }
.form-feedback.success { display: block; color: var(--status-online); }